Tehuantepec Forecast

September 18, 2026, 2:00 pm (UTC: -05:00)
Subject: Tehuantepec Forecast

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This forecast has not been reviewed. It was generated from an automatic model.

WARNINGS
.NONE.

.WITHIN 16N94W TO 16N95W TO 15N97W TO 13N97W TO 14N95W TO 15N94W
TO 16N94W...INCLUDING THE GULF OF TEHUANTEPEC...N TO NE WINDS 20
TO 30 KT. SEAS TO 2.5 M.
.24 HOUR FORECAST WITHIN 15N94W TO 16N94W TO 16N95W TO 16N96W
TO 14N96W TO 14N95W TO 15N94W...INCLUDING THE GULF OF
TEHUANTEPEC...N WINDS 20 TO 25 KT. SEAS LESS THAN 2.5 M.

THE PRESSURE GRADIENT BETWEEN A RIDGE OVER THE GULF OF AMERICA
AND THE EASTERN EXTENSION OF THE PACIFIC MONSOON IS SUPPORTING
STRONG TO NEAR-GALE FORCE NORTH TO NORTHEAST GAP WINDS ACROSS
THE GULF OF TEHUANTEPEC. SEAS WITH THESE WINDS ARE 6 TO 8 FT.
SCATTERED TO NUMEROUS SHOWERS AND THUNDERSTORMS ARE OVER MOST OF
THE OFFSHORE WATERS, WITH NUMEROUS COVERAGE OF THE ACTIVITY
CONFINED TO THE OFFSHORE WATERS OF JALISCO AND COLIMA. THE
NORTHERN PORTION OF TROPICAL WAVE EXTENDS ALONG 104W, NORTHWARD
TO NEAR 17N. THE GRADIENT RELATED TO HIGH PRESSURE WEST OF THE
BAJA CALIFORNIA OFFSHORES IS SUPPORTING MODERATE TO FRESH
NORTHWEST WINDS N OF CABO SAN LAZARO. MODERATE OR WEAKER WINDS
ARE ELSEWHERE ALONG WITH MODERATE SEAS, EXCEPT FOR SLIGHT SEAS IN
THE GULF OF CALIFORNIA.

SHORT-TERM TEHUANTEPEC
TODAY - NNW 10-12, Seas SE 0-2.1 ft @ 7sec
TONITE - ENE 6-8, Seas SE 0-2.1 ft @ 7sec
SATURDAY - W 10-13, Seas SSE 0.7-1.6 ft @ 7sec
SATURDAY NIGHT - WNW 14-17, Seas SSE 1.3-1.8 ft @ 7sec

LONG-TERM TEHUANTEPEC
SUNDAY - WNW 14-17, Seas SSE 1.3-1.8 ft @ 7sec
MONDAY - W 7-9, Seas S 0-2.1 ft @ 7sec
TUESDAY - N 9-11, Seas SSW 0.4-2.4 ft @ 6sec
WEDNESDAY - S 6-7, Seas SW 2.2-6.4 ft @ 15sec
THURSDAY - N 14-17, Seas SW 3.9-7.1 ft @ 14sec